A hybrid distributed broadcast and unknown server for emulated local area networks

摘要

A communication system comprises a plurality of interfaces disposed for sending data packets by way of virtual circuit connections and for receiving data packets by way of virtual circuit connections in an asynchronous transfer mode. The interfaces by means of said virtual circuit connections emulate at least one local area network including means for establishing a virtual circuit connection functioning as a BUS (broadcast and unknown server) for the broadcast of data packets throughout the emulated local area network. An asynchronous transfer mode switch receives packets by way of virtual circuit connections from each of said said interfaces, replicates the packets and sends them to all the other interfaces, whereby to establish a mesh between said interfaces. At least one interface comprises means for mapping virtual circuit connections between said one interface and at least one terminal (30) which is not directly connectable in said mesh connection into virtual circuit connections in said mesh.